San Diego County, San Diego Rat Control Situation:
Hi David, Is a UV blacklight still useful, exterior-wise, if it rains after the rodents leave their urine stains? I am in the process of performing exterior maintenance to better exclude my roof rats. 1) I have a 25 year old cedar shake roof in San Diego California with openings under each shake along the rake edge of the roof at the gable ends of my house. There's no drip edge, i.e. under the shakes I have roofing paper (now somewhat curled) that runs more or less up to and rests right atop the fascia board. Because I have skip sheathing, and since the cross section of a shake is a wedge that is up to one inch at the upper, thick end, this appears to create many huge entry points along the rake edges even though the sheathing is rabbeted into the fascia board. As a result, I'm thinking of getting a UV blacklight to use outside the house to sleuth for urine stains along the upper edge of the gable end shakes and fascia boards. My question is, how easily does the winter rain wash away the urine, rendering this a pointless exercise? 2) I noticed a new product called "rat-out gel" and was thinking of applying it along the rake edges mentioned above. Or, maybe I should just buy many rolls of X-Clude and use that instead. Or maybe both. Any comment? Thanks very much for your website, Doug
My response: First off, I do not have experience using UV lights to detect rat urine. But I do suspect that rain will severely limit the effectiveness of this approach. I have never heard of Rat-Out Gel or XClude, but I typically stick to physical barriers rather than repellent type devices. If your roof makes this impossible, you might have a tough time keeping the rats out.
San Diego Rat Control Tip of The Week
Reasons Why Rats Die Inside Attics And Houses
They Get Thirsty:
Rats often get thirsty when they have ingested any type of poison or when they cannot find their way out of a house. When rats go in search of water, they go towards an area where they will be closest to the outside world. When they have difficulty getting out of the home, they may find themselves in the attic close by their water source that they desperately need but unable to access a way out of the home.
They Get Poisoned On The Way Back To The Nest:
Rats will often travel throughout the home after they've been poisoned. Because poison often takes a bit of time to take effect, a rat might make its way up to the attic to stay warm and then die on its way back from the attic.
They Bleed Out:
Rats that have been affected by spring traps and other means for capturing may bleed out if they sustained serious injuries. This can happen quite quickly especially if the rat has made its way up to the attic to try and escape. This often becomes the final resting space for rats and this can eventually lead to foul odors.
They Get Stuck In Glue Traps:
Glue traps can be another cause for a rat to get stuck in an attic area. When a rat gets stuck in a glue trap it's possible that it will simply die in the area which can lead to people finding the rat or the rat causing a series of issues with smells and rotting. Glue traps are commonly placed in attics because this can be an easy place as it is out of sight for pets, toddlers, and home/business owners.
